!. How do you know that the file has her listed as a USC?
2. No, it is not normal to show a Canadian Birth Certificate when you get a social security number.
3. There is no 'blame' to take ... as long as she didn't check the US citizen box on the form.
4. Basically, I'd say forget about it ... except that I go back to point #1 ... how do you know what the SS records say?
PROFESSOR OF IMMIGRATION LAW for over 10 years -- This blog posting is offered for informational purposes only. It does not constitute an attorney-client relationship. Also, keep in mind that this is an INTERNET BLOG. You should not rely on anything you read here to make decisions which impact on your life. Meet with an attorney, via Skype, or in person, to obtain competent personal and professional guidance.
this is not an immigration law quesiton.
The information contained in this answer is provided for informational purposes only, and should not be construed as legal advice on any subject matter,not should it be viewed as establishing an attorney client relationship of any kind.